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CSS Flexbox & Grid Playground

Experiment with CSS Flexbox and Grid layouts using visual controls, a live preview and per-item settings, then copy the generated CSS.

CSS Flexbox & Grid Playground

Container properties

Items: 5

Click an item in the preview to configure its individual properties.

Live previewdisplay: flex
Item 1
Item 2
Item 3
Item 4
Item 5

Generated CSS

.container {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: stretch;
  align-content: stretch;
  gap: 8px;
}

Updated . Provided as is. Check the output before you rely on it in production.

How to use CSS Flexbox & Grid Playground

  1. 1

    Pick Flexbox or Grid

    Switch between the Flexbox and Grid playgrounds. Each has its own container controls and live preview.

  2. 2

    Adjust container properties

    Set flex-direction, flex-wrap, justify-content, align-items, align-content and gap. The preview updates as you change them.

  3. 3

    Control individual items

    Click an item in the preview to set its flex-grow, flex-shrink, flex-basis, align-self and order.

  4. 4

    Build grid layouts

    In Grid mode set grid-template-columns and rows, gap and alignment, or start from a preset such as Holy Grail or Sidebar Layout.

  5. 5

    Copy the CSS

    Copy the generated CSS from the code panel into your stylesheet.

Questions and answers

What is CSS Flexbox & Grid Playground?
Flexbox lays items out along one axis and CSS Grid along rows and columns, both controlled by a handful of container and item properties. This playground sets those properties with visual controls, shows the result live, and generates the CSS for the container and items.
Can I add and remove child elements in the playground?
Yes. Flexbox mode shows 3 to 8 items and Grid mode 6 to 12, set with the item counter. Select a flex item to change its flex-grow, flex-shrink, flex-basis, align-self and order.
For AI agents: how to call this tool

Machine-readable contract, endpoints and examples. Humans can ignore this section.

Best Path For Builders

Browser workflow

Runs instantly in the browser with private local processing and copy/export-ready output.

Browser Workflow

This tool is optimized for instant in-browser execution with local data handling. Run it here and copy/export the output directly.

/flexbox-playground/

For automation planning, fetch the canonical contract at /api/tool/flexbox-playground.json.